According to the Commercial Code, a bankrupt merchant is exempt from paying late payment compensation after stopping. Disagreement over whether the guarantor of the bankrupt merchant follows the merchant regarding the compensation for late payment compensation has caused the General Assembly of the Supreme Court to issue a unanimous decision No. 788 dated 2020/06/16in which, in authors opinion, Civil opinion overcomes the issue of dispute and the special conditions of the Commercial Code and the comprehensive provisions that apply to bankruptcy are abandoned and regardless of the circumstances of bankruptcy according to the rule of guarantor liability compliance with the main debt in civil law, The guarantor is also exempt from paying the compensation for the delay. The question that comes to mind is whether in all cases the amount of liability of the guarantor is a function of the amount of liability of the subject and follows it? In this article, through descriptive-analytical research method, the commercial law and the different view governing trade relations in different fields were considered and led us to believe that, basically, except in special cases, purely civil views and provisions of the civil law should not be used in interpreting commercial regulations and the theory of commercial regulation independence should have been protected to meet the commercial needs of society. This independence has been violated in the unanimous vote of the mentioned procedure and has caused confusion of the provisions of commercial law and civil law. Inevitably, like the vote of unity of procedure 811, which was held to explicit the vote 733; By issuing a new unification procedure, or explicitly amending articles such as Article 405 or Article 421 of the Commercial code, the guarantor shall retain responsible for paying the late payment compensation despite the bankruptcy and exemption of the trader.